A Fallen Log                                           -      -      - 
(-------------------------------------------------)     W <---(M)---> E
                                                        -      -      -

You are balancing upon a fallen tree, scorched from the blast of
lightning which severed it from the earth.  You look down at the valley
floor, realizing how far it is if you fell, you begin to get dizzy and start
to wobble.  You manage to balance yourself again and decide you better move
on.